How do you make coleslaw like Doug's Fish Fry restaurant?

I used to work there and can confirm the following ingredients are in the coleslaw dressing, which is the same sauce they serve in the dining room called "Dippin' Chicken" sauce:

• Sugar
• Mayonaise
• White vinegar
• Worchestershire
• Sherry wine
• black pepper
• Salt
• Celery seed
• Minced celery
• Minced Onion

I'm going off memory, but I know the taste quite well so start with the sugar and vinegar, slightly more sugar than vinegar. Then about a 1-1 ratio of that micture and mayo (depending on the amount you want to make) I've usually made it without the minced celery and onion and it's close enough for me to be happy. The main things that drive the flavor are really that sweet, tangy base, black pepper and celery seed. Good luck!